Saubert signed a one-year deal with the 49ers on Monday.
Saubert did not suit up for Houston's 34-10 playoff loss to Baltimore last Saturday. He finished the season three receptions on three targets for 12 yards over nine games played.
Saubert played all 25 of his snaps on special teams in the Texans' 19-16 overtime win over the Titans.
Saubert (coach's decision) is inactive ahead of Sunday's game against the Cardinals.
Saubert was not targeted and played 12 snaps in Sunday's 39-37 win over Tampa Bay in Week 9.
The Texans signed Saubert from the Cowboys' practice squad to their active roster Tuesday.
The Cowboys elevated Saubert to the active roster Saturday.
The Cowboys signed Saubert to their practice squad Tuesday, Nick Harris of the team's official site reports.
Saubert (undisclosed) had a workout with Pittsburgh on Wednesday, Aaron Wilson of KPRC 2 Houston reports.
Saubert (undisclosed) was placed on injured reserve by the Dolphins on Tuesday.